Fig. 3.

Corrected Pb–Pb ages of the angrites (shown in Table 2, and calculated using the average ²³⁸U/²³⁵U ratio of 137.780 ± 0.021 based on all angrite whole-rock samples analyzed here) and the unique achondrite NWA 2976 (calculated using its measured ²³⁸U/²³⁵U ratio; ref. 21) compared with relative ages based on short-lived chronometers (“model ages”) anchored to the corrected Pb–Pb age for D’Orbigny of 4563.37 ± 0.25 Ma. By definition, since D’Orbigny serves as the age anchor, the ages based on the short-lived chronometers for this sample are identical to its Pb–Pb age.